is bleach episode 356 filler?

At the Urahara Shop, Isshin Kurosaki and Kisuke Urahara discuss their plans, with Urahara demanding to know if he is sure about going through with them, for a father can ruin his child's chances. With a cylinder glowing with Reiatsu between them, Isshin, stating he has made his mind up, tells Urahara to stop asking him over and over.

Sighing, Urahara, looking down, states Isshin is right: they should not delay any longer, and it is time they move on to their next phase. As a Shinigami arrives on the scene from a Senkaimon, Urahara tells them to place their Reiatsu into the cylinder so the process will be complete.